コロラド川沿いで貨物列車と交換

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コロラド川沿いで貨物列車と交換
Freights by railways are important in the US because ships cannot be used for freights to and from inland states, and for freights between west and east coasts. Before the construction of transcontinental railways, it was said that transportation from another country is easier than that from other states in the US.